Unlock instant, AI-driven research and patent intelligence for your innovation.

Welding Tool Comprising a Shoulder, Welding Method and Workpiece

a welding tool and shoulder technology, applied in the field of welding tools, can solve the problems of restricted free movement of welding tools in three dimensions, inability to weld containers, and inability to weld scarf joints and flange seams

Active Publication Date: 2014-07-24
AIRBUS DEFENCE & SPACE
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a device called a shoulder that improves the welding of materials together using friction stir welding. The shoulder has a surface that matches the shape of the material being welded, which improves access for the welding tool. Additionally, the shoulder can be designed to mold the connection region, creating a bevel or chamfer without needing further treatment. This improves the final quality of the welded material. Overall, the shoulder enhances the efficiency and quality of friction stir welding.

Problems solved by technology

The friction stir welding process has the disadvantage that the shoulder must be in continuous contact with the workpieces being welded, and as a result, the freedom of movement of the welding tool in three dimensions is restricted.
By way of example, it is not possible to weld containers all the way into the corners thereof, it is not possible to weld scarf joints and flange seams, and excesses of material are created that must be removed by further treatment.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Welding Tool Comprising a Shoulder, Welding Method and Workpiece
  • Welding Tool Comprising a Shoulder, Welding Method and Workpiece
  • Welding Tool Comprising a Shoulder, Welding Method and Workpiece

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0035]FIG. 1 shows a longitudinal cutaway view of a welding tool 10 having a shoulder 12 and a probe 14 for the purpose of connecting two workpieces 18, 20 by means of friction stir welding.

[0036]The workpieces 18, 20 are secured against sliding by means of holder devices 22 during the treatment with the welding tool 10.

[0037]The probe 14 rotates about an axis A. To connect the workpieces 18, 20, the probe 14 of the welding tool 10 brings friction heat into a connection region 24 of the workpieces 18, 20, via the first workpiece 18. In this way, the material of the workpieces 18, 20 softens, is stirred in the region of the joining zone by the rotation of the probe 14, and the workpieces 18, 20 become connected to each other.

[0038]The shoulder 12 surrounds the probe 14 without contacting the same, and lies on the workpieces 18, 20 via the shoulder surface 26 thereof, in the region of the connection region 24, in order to separate the connection region 24, as well as a welded seam (no...

second embodiment

[0040]FIG. 2 shows a longitudinal cutaway view of a welding tool 10, having the shoulder 12 and the probe 14. The shoulder in this case likewise has the projection 30, which, however, is arranged not on the shoulder surface 26, but rather next to the same. As such, a welded seam can be produced at a larger distance from the edge 32 of the workpiece, and at the same time the edge 32 of the workpiece can be molded.

third embodiment

[0041]The longitudinal cutaway view in FIG. 3 shows the welding tool 10, wherein the shoulder 12 has a shoulder surface region 36 with a convex curve. With the curved shoulder surface region 36, it is possible to weld workpieces 18, 20 to each other on rounded ends 38, while forming a concave surface 40. As an alternative, the shoulder surface region 36 can also have a concave curvature in order to mold a convex connection region 24.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A welding tool for connecting at least two workpieces at a connection region by friction stir welding includes a shoulder that separates the connection region from the surroundings. The shoulder is designed as a molding tool to mold during the friction stir welding.

Description

BACKGROUND AND SUMMARY OF THE INVENTION[0001]Exemplary embodiments of the invention relate to a welding tool for connecting at least two workpieces at a connection region by means of friction stir welding.[0002]In friction stir welding, in contrast to friction welding, the friction energy is not generated by rotation of one of the two workpieces being connected relative to the other workpiece; rather, a wear-resistant welding tool applies rotational energy to the two workpieces. In the process, the following steps are carried out:[0003]In the first step, the welding tool and the rotating probe thereof are pressed with high force into a connection region between the two workpieces being connected, until a shoulder of the welding tool, the shoulder surrounding the probe in a contactless manner, comes to rest on the surface of the workpieces.[0004]In the second step, the rotating probe remains on the welding start point for a brief time, and the connection region between the shoulder o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B23K20/12
CPCB23K20/122B23K20/1245B23K20/1265
Inventor SILVANUS, JUERGENFORSTER, ERICHTAUSCHER, ERIC
Owner AIRBUS DEFENCE & SPACE